Undefined symbols for architecture x86_64:

Question

Undefined symbols for architecture x86_64:
"_main", referenced from:
implicit entry/start for main executable
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
是不是需要安装XCode？？

Answer 1

提问者 慕瓜8175459 2019-11-14 09:29:01

有的，我找问题了，是在clang命令的时候少输入一个参数造成的

Answer 2

李超 2019-11-14 09:22:08

你之前是不是配置过交叉编译环境？如果配置过，需要把环境回复一下

Answer 3

李超 2019-11-13 06:41:06

你是啥系统，用什么编译器编译的？

• 提问者 慕瓜8175459 #1

  系统：Mac 10.14.3 
  ffmpeg编译参数：
  ffmpeg version N-95621-g53c21c2d6b Copyright (c) 2000-2019 the FFmpeg developers
    built with Apple LLVM version 10.0.1 (clang-1001.0.46.4)
    configuration: --prefix=/usr/local/ffmpeg --enable-gpl --enable-nonfree --enable-libfdk-aac --enable-libx264 --enable-libx265 --enable-filter=delogo --enable-debug --disable-optimizations --enable-libspeex --enable-videotoolbox --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --cc=clang --host-cflags= --host-ldflags=
    libavutil      56. 35.101 / 56. 35.101
    libavcodec     58. 60.100 / 58. 60.100
    libavformat    58. 33.100 / 58. 33.100
    libavdevice    58.  9.100 / 58.  9.100
    libavfilter     7. 66.100 /  7. 66.100
    libswscale      5.  6.100 /  5.  6.100
    libswresample   3.  6.100 /  3.  6.100
    libpostproc    55.  6.100 / 55.  6.100
  Hyper fast Audio and Video encoder
  
  安装的插件：
  faac			openssl@1.1		x264
  faad2			pcre			x265
  fdk-aac			pkg-config		xvid
  lame			rtmp-nginx-module	yasm
  libogg			sdl2
  nginx-full		speex
  
  Clang版本：
  Apple LLVM version 10.0.1 (clang-1001.0.46.4)
  Target: x86_64-apple-darwin18.2.0
  Thread model: posix